This is my 4th DJI drone. I have a Phantom 3, Mavic Pro, and Mavic Air, that I controlled with the use of my cell phone. I just purchased a M2Z with the smart controller. I have only flown close to my home using my WiFi connection. Since the controller doesn't have a SIM card I'm assuming that I will have to use my mobile hot spot to be able fly when I am away from home. I have noticed that my hot spot isn't very reliable. What is going to happen if I lose my hot spot or WiFi connection while flying? Do I have to have a internet connection to fly. I would appreciate any input on this subject please.